Mold-making machine.



H. R. ATWATER. MOLD MAKING MACHINE. APPLIGATxoN FILED 001219, 1910.

Patented May 13, 1913.

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H. R. ATWATER. MOLD MAKlNG MAGHINE. APPLICATION FILED 00119, 1910.

Patend May 13, 1913.

2 SHEETS-SHEET 2.

n sri-tres PATENT oFFioE.

HARRY R. ATWATER, 0F CLEVELAND, OHIO, ASSIGNGR TO THE OSIBGRN` MANUFC-TUBING COMPANY, 0F CLEVELAND, OHIO, A CORPORATIG? OHIO.

:MOLD-MAKING MACHINE.

Specification of Letters Patent.

Patented )lay 13, 1913,

Application filed October 19, ll. Serial No. 587,615.

To allv whom it may vow/'m i 2 is a plan view of the same; while Fig. 3

Be it known that I, HARRY A'ruwrizn, 2 is a side elevational view ofanother design a citizen of the United States, and a resident ofCleveland, county of Cuyahoga, and State of Ohio, have invented a newand useful Improvement in Mold-Making Machines, of which the followingis a specification, the principle of the invention being hereinexplained and the best mode in which I have contemplated applying thatprincipleso as to distinguish it from other inventions.V

The type of mold-making machine, to which the present invention relates,is known as the rock over wherein an oscillatory carrier for the patternplate is provided, so that the mold may be lled in one position of saidcarrier, and then turned t over 1n reverse position upon a suitableparting stand. Such stand, in the preferred form of constructionillustrated, is vertically reciprocable, so as to draw the mold awayfrom the pattern, although it may be arranged to raise thepattern-carrier and pattern, instead. ln the type of machine referredto, furthermore, it is customary to employ resilient means, generally inthe form of tension springs connected to the oscillatory patterncarrier, whereby the movement of the latter may be facilitated, it beingunderstood that a considerable weight is attached thereto when, the moldis filled.

The object of the provient invention is the revision of-a mold-makingmaehine of -the ind described',- v'vherein resilient means;v of greatertension may be employed, thus correspondingly lightening the operatorstask, as also to ,provide means for preserving the carrier and attachedpattern plate in exact horizontal ai'ihement during the drawing of themold, or other words, the parting of such mold frointhe pattern.

Tothe accomplishment of these and related ends, said invention, then,consists of the means hereinafter fully described and particularlypointed out in the claims.

` The annexed drawings and the following description set forth in detailcertain mechanism embodying the invention, such disclosed meansconstiti'f'ing, however, but one of various mechanical forms in whichthe principle of the invention may be used.

In said annexed drawings :--Fig ure 1 is a side elevation of a,mold-'making machine l have incorporated the present invention inslightly modilied form; Fig. 4 is a horizontal section on the line 4-4in Fig. 1; and Fig. is avertical section on the line 5-5 in Fig., 2.

The machine to which my present improvements are shown as applied inFigs. 1 and 2, is in general the same as that shown in U. S. Patent No.937,036 issued to me under date Get. 19, 19(19. In such machine theframe l which is preferably mounted on low wheels or rollers 2 to permitof its movement about, includesl the mold filling and parting stands 3and 4. above referred to between which, upon two laterally spacedstandards 5 that are integral, or rigid, with the frame-work of themachine, is oscillatorily mounted the carrier, or atternlate holder 6.This pattern-plate liolder, owever, is not directly pivotall attached tothe shaft 7 in such standards, w ich forms, more exactlyspeaking, thesupport therefor, but is rather adjustably secured in a secondary frame.8 that is thus supported on the shaft and formed with guide-ways 9 sodisposed as to lie vertically when said frame is positioned in contactwith a stop 10 rovided to limit its movement toward t e parting stand.The pattern-plate holder, then, is mounted upon said guide-ways so as tobe in edeet vertically adjustable with respect to said parting stand insuch position of the frame, set screws 11 or like means being providedin conjunction with the gui-1c:- ivays to secure said plate holderv inany such vertical posit as may be desired.

The filling stand 3, upon which the mold is designed to 'rest pendingthe filling and stamping of the sand therein, comprises a pair ofplungers each with a small rest or head 12 on its upper end, suchplungers being adjustably secured in suitable splitA collars 13 or thelike that form a part of the frame. The parting stand 4 on the otherhand, comprises a plunger adapted t0 be vertically reciprocated by meansof a rockshaft 14 bearing a cam 15, such'plunger being provided with aplatform-like head 16 upon which laterally spaced, depressible members17 are arranged so as to be depressed by the mold bottom during theplacing of the mold in position preparatory to freeing the same from thepattern embedded in the top of the material with which the flask of themold is rammed. Such members 1T are thereupon secured against furtherdepression, as by clamps 18, so as to support, in other words, the moldin exactly the position itis left when the pattern-plate carrier isturned over.

Springs 1S) preferably four in number, connected at one end to a bar 20transversely disposed of the filling stand and at the other end to a barQ1 similarly' transversely secured in the secondary frame 8, tend tomaintain the pattern plate holder in a more or less vertical position;in ,other words, they relieve, or counterbalance, the weight of the moldin both of the horizontal positions of the holder or carriage. In orderthat such springs may be of proper assistance in thus swinging thecarrier after the mold has been filled, they will obviously require tobe considerably stronger than to counterbalance the unloaded carrier.This. however' entails considerable annoyance in the filling operation,for the reason that the carrier tends to rise therefrom, while similarlyin the parting operation, the carrier will tend to fly up, the moment itis relieved from theweight of the attached mold, thus endangering theimpression of the pattern, as Will be obvious. It has also been foundthat while the mold is still attached to the carrier in the partingposition, :the strain upon the pattern-earner support, owing tothe/leverage of the carrier is very considerable, sutficient in fact todistort the carrier and machine frame more or less` especially inmachines designed for handling heavy work; so that the outer portion ofthe carrier may lie a trifle belenr the horizontal plane in which itshould be maintained. Thus, despite the construction of the partingstand whereby a very exact leveling of the mold would ordinarily beobtained, difficulty may nevertheless arise from this distortion of thecarrier frame.

It is in order to overcome the several dif-A ficulties just referred. tothat the present improvements have been designed, such improvementsconsisting in the first place, in the provision of latch means forretaining the pattern plate carrier in position upon the filling standagainst the excessive tension of the springs 19.

In the preferred construction illustrated, two catches 22, 22respectively mounted on the ends of` an oscillatory shaft 23 on theplungers constituting the filling stand Il, are provided, such catchesbeing adapted to engage with suitable lugs 24 on the corresponding sidesof the pattern plate holder. Springs 25, connected with said catches,serve normally to effect their engagement upon the simple depression ofthe holder into its filling position, while an extension this member isprovided with a notch 29 adapted to engage with a transverse pin 30, orequivalent element on the pattern plate holder; as also with a hook-likeclam 31, that is adapted thereupon to be drawn own over such pin 30,thus securing the frame against either downward or upward movement. Thelocation of pin 30, as also of the pivot pin 32, attaching the member 27to the frame extension 28, may be varied to correspond with differentsized flasks; a series of holes being provided to receivethe pin in cachcase; while the length 0f the member 27 is likewise'adapted to beadjusted to correspond witlr'ttie adjusted height of the pattern-plateholder by being made of two sections, oneA damped or threaded Within theother aswill be readily understood. The object, ofcourse, is to maintainsuch holder in a erfectly horizontal position despite the weight of theattached mold the parting stand being then adjustable, by virtue of itsconstruction, to the bottom of the mold as ii.- is supported from thehorizontally disposed holder. Upon detaching the mold from the holder,the latter is held against movement under the tension of the springs 19,until the operator has time to lower the mold safelyaway from thepattern; then at his leisure he releases pin r'30 from the clam 31, andrestores the pattern-plate hol er to its filling position, where it issecured by catches 22. It will be understood that this last describeddevice need not of necessity combine both of the functions which it isthus seen to fulfil in other words, in the case of a machine designedfor light work it may not be found necessary to sustain the patterncarrier,

and the member 27 may be simply used,

muchas the catch on the parting stand side, to prevent said carrier frommovement until the operator is ready. So, conversely, in machines of thetype illustrated in my c0- pending application filed July 28, 1909,Serial No. 509,989, where power means are provided for oscillating thepattern carrier (such power means operating through the springs so thatthe latter are not under tension until it is started to oscillate thecarrier), it may not be necessary to use the retaining feature butmerely the strut feature of such member. It is particularly in thehandling of heavier molds for which this power machine is especiallydesigned that distortion of the carrier and machine trame is apt tooccur. Such power machine is illustrated in Fig. 3 of the drawings wherethe parting stand 4, filling stand 3, and pattern plate carrier' areidentitied with the same reference characters as in the precedingdescription. The power means in this case consists specifically of acylinder 33, the piston rod 34 in which is adapted to oscillate a rockshaft 35 to put under tension suitable springs 36, and thereby pull overthe pattern-plate holder,i or carrier frame 6. iVith the exception ofthose noted, however, the other eneral features of the machine are not opresent interest, and hence need not be described. Attention is called,however, to the use here, instead of a member Q7 having both supportingand retaining means, of a simple detachable strut 37, which is adaptedto be inserted in posi tion to engage with the carrier frame in itsparting position and support the same so as to prev'ent distortionthereof by reason ot the heavjyr Weight attached to it. Since thetension of the springs 36 is relieved after the turning over of thecarrier, by suitable operation of rock-shaft 35, there is no dispositionpresent on the part of such frame to swing back prematurely. Another feature to which attention is desired in connection with this power machineis the use of a worm 38 and worm gear 39 for raising and lowering theparting stand, in place of the cam 15 utilized for the purpose in thepreviously described form of machine. The operative connections of suchgear l'learly appear in Fig. 3, as also the shaft 40 that carries theworm, such shaft inclinin at an angle so as to bring the hand whee 41 onits upper end into a position conveniently adjacent to the operatorsstation.

Other modes of applying the rinciple of my invention may oe employed)instead lof the one explained, change being maria as regards themechanism herein dlsclosed, provided the means stated by any of thefollowing claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my inventionf 1. In a machine of the character described, the combination of astand; an oscillatorily supported pattern carrier adapt ed in oneposition to rest u'pon said stand,

said carrier being adapted to receive the fiask to be filled; springsconnected with said carrier and adapted to raise the same with a fiaskwhen unfilled but not when filled; an automatically operative catchmounted on said stand and adapted to secure said carrier in positionthereon against the action of said springs; resilient means renderi saidcatch thus operative; and a tread]y or releasing said catch.

2. a vmachine of the character described, the combination of a fillingstand and a partiti stand; a carrier for the pattern and dasoscillatorily supported on a transverse axis between said stands andadapted in one position to rest upon said filling stand and in anotherposition to extend horizontally over said parting stand with such flaskresting thereon; resilient means connected with said carrier and adaptedto raise the same with a iask when unfilled but not when filled; a strutadapt ed to engage the outer, or` free, end of said carrier and supportthe same in its horizontal position over the parting stand; andretaining means adapted to dctacha'oly secure said carrier in such otherposition upon said filling stand against the action of said resilientmeans.

3. In a machine of the character described, the combination of a fillingstand and a parting stand, the latter being vertically reciprocable towithdraw the mold from the pattern; a member oscillatorily sup` portedon a transverse axis between said stands; a pattern carrier adjustablysecured t0 said member and adanted in one ysition 'to rest upon saidtillin stand an in another position to extend horizontally over saidparting stand; means tending to raise said carrier from such positions;and catches respectively adapted to detachablxi,v secure said carrier ineach of said ositlons, the catch associated with the parting stand beingvertically adjustable to correspond with the adjusted position of saidcarrier on said member.

4. In a machine of the character den scribed, the combination of afilling stand and a parting stand, the latter being verticallyreciprocable t0 withdraw the mold from the pattern; a memberoscillatorily supported on a transverse axis between said stands; acarrier for the pattern and flask lidjustably secured to said member andadapted 1n one position to rest upon said filling stand and in anotherposition to extend horizontally over said parting stand with such fiaskresting thereon; resilient means connected with said carrier tendin toraise the same with a flask when unfille but not when filled; andcatches res ectively adapted to detachably secure sai carrier in each ofsaid positions, the catch associated with the parting stand beingvertically adjustable to correspond with the adjusted position of saidcarrier on said member.

5. In a machine of the character described, the combination of a fillingstand and a parting stand, the latter being vertically reciprocable towithdraw the mold from 'the pattern; a member oscillatorily supported ona ltransverse axis between said stands; a pattern carrier ad'ustablysecured to said member and adapte in one osition tojcst upon said standan in another position to extend horizontally over said parting stand;and an adjustable strut adapted to engage said carrier and support thesame in such last-named position.

6. In a machine of the .character described, the combination of afilling stand and a parting stand, the latter being verticallyreciprocable to Withdraw the mold from the pattern; a carrier for thepattern oscillatorily supported on a transverse axis between saidstands, and adapted in one osition to rest upon said filling stand and1n another position to extend horizontally over said parting stand; and`astrut adapted to engage th free end of said carrier and support thesame in such last-named position, said strut being adjustabletransversely of the axis of osclllation of said carrier so as to beadapted to thus en age the free end of the same at different istancesfrom suchr axis. Y

Signed by me this 12th day of October, 1910.

HARRY R. ATWATER.

Attesd by- ANNA L. GILL, JN0. F. OBERLIN.

